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WorksheetsBlock 14
Total questions: 54
Worksheet time: 27mins
The NGH provides heated air for what 5 things
Aircraft cabins, maintenance equipment, passenger areas, storage facilities, and portable offices
Aircraft Maintenance Personnel, flight line support, ground vehicles, maintenance shelters and portable hangars
Ground crews, aircraft systems testing, repair stations, emergency shelters, and field operations
Runway de-icing, aviation tools, hangar heating, fuel trucks, and aircraft service areas
The NGH is a ___
Fully Enclosed, self contained unit
Portable, high-capacity cooling system
Compact, trailer-mounted heating device
Modular, multi-purpose heating unit
The NGH is unsafe for operation in ____ environments due to open flames in the ____
Explosive & Combustion Chamber
Flammable & Heating Element
Hazardous & Burner Assembly
Volatile & Ignition System
Internal components are located where?
Burner Tube
Burner Motor
Combustion Tube
Fuel Burner unit
What are the 3 internal components
Fuel Nozzle, Ignition Points, Photocell
Burner Tube, Photocell, Fuel Nozzel
Ignition Points, Burner Motor, Ignition Transformer
Blower, Fan, Heater
____ Atomizes fuel into a mist that mixes with air as it enters the combustion chamber
Photocell
Fuel Nozzel
Combustion Air Blower
Burner Motor
What are the 4 external components
Fuel Nozzle, Ignition Points, Photocell, Burner Tube
Burner Tube, Photocell, Fuel Nozzel, Ignition Transformer
Ignition Transformer, Burner Motor, Combustion Air Blower, High Pressure Fuel Injection Pump
Blower, Fan, Heater, High Pressure Fuel Injection Pump
A heat range of ____ is provided by the three temperature settings
225 - 508°F
75 - 230°F
405 - 670°F
150 - 305°F
___ Fan that provides all air for combustion in the combustion chamber
Flammable Air Blower
Combustion Air Blower
High Pressure Fuel Injector Pump
Burner Motor
___ Operated by burner motor, provides fuel flow for burner operation at 175 psi
Flammable Air Blower
Combustion Air Blower
High Pressure Fuel Injector Pump
Burner Motor
The Fuel Pressure Injection Pump operates at what psi
125
175
95
205
The diesel engine drives what?
Burner Motor
Alternator/Generator
Air Engine
Engine/Burner
What is the low temperature setting for the NGH
150 - 185°F
210 - 245°F
270 - 305°F
70 - 105°F
What is the medium temperature setting for the NGH
150 - 185°F
210 - 245°F
270 - 305°F
70 - 105°F
What is the high temperature setting for the NGH
150 - 185°F
210 - 245°F
270 - 305°F
70 - 105°F
___ Steps up 120 VAC to 14,000 VAC for ignition arc
Ignition Transformer
Burner Motor
Ignition Points
Photocell
____ provides rotational motion for combustion air blower and fuel injection pump
Ignition Transformer
Burner Motor
Ignition Points
Photocell
Burner Motor operates at ____ rpm
3450
120
14,000
3050
Ignition transformer steps up 120VAC to ____
14,000 VDC
3,450 VAC
14,000 VAC
3,450 VDC
____ Provides the air gap for the arc to ignite the air/fuel mixture in the combustion chamber
Ignition Transformer
Burner Motor
Ignition Points
Photocell
___ Monitors presence of a flame (light) in the combustion chamber
Ignition Transformer
Burner Motor
Ignition Points
Photocell
____ Provides a suitable atmosphere for complete combustion of air/fuel mixture
Combustion Chamber
Heat Exchanger
Baffles
Combustion Air Blower
____ Houses the fuel burner unit's burner tube in its inlet
Combustion Chamber
Heat Exchanger
Baffles
Combustion Air Blower
____ Ensures a clean combustion with virtually no coking (carbon buildup resulting from incomplete burning of fuel)
Combustion Chamber
Heat Exchanger
Baffles
Combustion Air Blower
Combustion gases leave and are routed through the heat exchangers ____
Ports
Channels
Baffles
Tubes
what Provides passages for main air flow (clean air) through the heat exchanger
Ports
Channels
Baffles
Tubes
____ Separates main air flow from combustion gases keeping carbon monoxide out of the main airflow
Combustion Chamber
Heat Exchanger
Baffles
Combustion Air Blower
____ is a Stainless steel box made of hollow ports and channels
Combustion Chamber
Heat Exchanger
Baffles
Combustion Air Blower
____ Reduces the velocity of the combustion gases to provide better heat transfer
Combustion Chamber
Heat Exchanger
Baffles
Combustion Air Blower
Where are baffles located
Combustion Air Blower
Heat Exchanger Channels
Main Air Fan
Exhaust Pipe
The heat exchanger works on the principles of?
Thermal induction
Heat transfer
Heat induction
Thermal transfer
Thermal energy is transferred from the ____ to the main airflow through the walls of the heat exchanger
Burner Motor
Exhaust pipe
hot combustion gases
Photocell
____ Provides constant air flow through the combustion chamber
Combustion Air Blower
Main Air Fan
Exhaust System
Flexible Ducts
____ Provides air for combustion and forces the hot expanding gases into the heat exchanger channels and out the exhaust stack
Combustion Air Blower
Main Air Fan
Exhaust System
Flexible Ducts
Uninterrupted airflow ensures _____ from the combustion chamber
residual fuel is purged
efficient heat transfer occurs
proper pressure is maintained
harmful gases are expelled
The combustion air blower is driven by the?
Alternator/Generator
Burner Motor
Main Air Fan
Fuel Pumps
Main air fan is Directly driven by a ____ electric AC motor
3550 rpm
1350 rpm
1700 rpm
1200 rpm
____ Provides the main airflow to be heated or used for ventilation
Combustion Air Blower
Main Air Fan
Exhaust System
Flexible Ducts
Main air is forced around the burner chamber and through the heat exchanger ports by the ____
Combustion Air Blower
Main Air Fan
Exhaust System
Flexible Ducts
____ Carries heated/ventilated air to the required area
Combustion Air Blower
Main Air Fan
Exhaust System
Flexible Ducts
Operated inside a building, exhaust gases must be routed outside by means of a suitable ____
Combustion Air Blower
Main Air Fan
Exhaust System
Flexible Ducts
What are the 2 exhaust system outlets
Burner Assembly Exhaust & Ventilation Exhaust
Power Unit Exhaust & Auxiliary Exhaust
Engine Exhaust & Heat Exchanger Exhaust
Combustion Chamber Exhaust & Cooling Air Exhaust
When a carbon monoxide test fails what must be replaced
Exhaust System
Heat Exchanger
Combustion Chamber
Air Deflector
Where is the Air Deflector located
Combustion Chamber
Main Airflow Stream
Exhaust System
Blower Assembly
____ Directs main airflow air around the combustion chamber to the heat exchanger port and outlet port
Exhaust System
Heat Exchanger
Combustion Chamber
Air Deflector
Where is the Air Deflector located
Combustion Chamber
Main Airflow Stream
Exhaust System
Blower Assembly
What Allows heated air to leave the unit and to attach flexible ducts
Outlet Port
Outlet Cover
Exhaust System
Air Deflector
What protects the NGH from debris, water, and corrosion when not in use
Outlet Port
Outlet Cover
Exhaust System
Air Deflector
When the NGH is operated inside a building a ____ must be connected to both exhaust stacks
Leak proof extensions
Ventilation duct
Sealed exhaust pipe
Heat-resistant hose
The burner motor operates the ____ and ____
Photocell & Burner Motor
Combustion Air Blower & Fuel Injector Pump
High Pressure Fuel Injector Pump & Blower Motor
Burner Motor & Combustion Chamber
The heat exchanger contains ports and channels to keep the ____ gasses separate from the ____ airflow.
Exhaust & Clean Air
Exhaust & Moisturized Air
Dirty Air & Clean Air
Carbon Monoxide & Chorine
The heat exchanger is constructed from ___ to resist corrosion
Stainless Steel
Plastic
Titanium
Alkali metals
The main airflow is provided by the
Combustion Air Blower
Main Air Fan
Exhaust System
Flexible Ducts
What causes cracks
Repeated Heating and Cooling
Trapped Air
Heated Fuel
Cold Weather Conditions
